import { reqCartList,reqDeleteCartById,reqUpdateCheckedById } from "@/api";
const state = {
    cartList:[]
};
const mutations = {
    GETCARTLIST(state, cartList) {
        state.cartList = cartList;
    }
};
const actions = {
    //获取购物车列表数据
    async getCartList({commit}){
        let result = await reqCartList();
        if(result.code==200) {
            commit("GETCARTLIST", result.data);
        }
    },
    //删除购物车某一个产品
    async deleteCartListBySkuId({commit}, skuId) {
        let result = await reqDeleteCartById(skuId);
        if(result.code == 200) {
            return 'ok';
        }else {
            return Promise.reject(new Error("faile"));
        }
    },
    //修改购物车某一个产品的选中状态
    async updateCheckedById({commit}, {skuId, isChecked}) {
        let result = await reqUpdateCheckedById(skuId, isChecked);
        if(result.code == 200) {
            return 'ok';
        }else{
            return Promise.reject(new Error('faile'));
        }
    },
    //删除全部勾选的产品
    deleteAllCheckedCart({dispatch, getters}) {
        //context:小仓库，commit[提交mutations修改state] getters【计算属性】dispatch【派发action】 state【当前仓库数据】
        //获取购物车中全部的产品（是一个数组）
        let PromiseAll = [];
        getters.cartList.cartInfoList.forEach(item => {
            let promise = item.isChecked==1?dispatch('deleteCartListBySkuId',item.skuId):'';
            //将每一次返回的Promise添加到数组当中
            PromiseAll.push(promise);
        });
        //只要全部的p1|p2....都成功，返回结果即为成功，如果有一个失败，返回即为失败
        return Promise.all(PromiseAll);

    },
    //修改全部产品的状态
    updateAllCartIsChecked({dispatch, state}, isChecked) {
        //数组
        let promiseAll = [];
        state.cartList[0].cartInfoList.forEach(item=>{
            let promise = dispatch('updateCheckedById',{skuId:item.skuId,isChecked});
            promiseAll.push(promise);
        });
        //最终返回结果
        return Promise.all(promiseAll);
    }
};
const getters = {
    //简化数据
    cartList(state) {
        return state.cartList[0] || {};
    },
    //计算出来购物车数据
    
};

export default{
    state,
    mutations,
    actions,
    getters
}